煤层气已排采井井间干扰试井解释方法及应用

发布时间：2018-01-13 02:02

本文关键词：煤层气已排采井井间干扰试井解释方法及应用　出处：《煤炭学报》2017年05期 　论文类型：期刊论文

【摘要】：干扰试井是确定井间关系、连通状况和求解井间地层特性的重要手段。煤层气已排采井在关井进行干扰试井测试时,井底压力为本井恢复压力叠加激动井干扰后的复合压力,区别于常规干扰试井背景压力为均一的原始储层压力或成线性变化的特征。提出了采用多井数值试井分析对煤层气已排采井的井底压力进行净干扰压力分离的方法;采用以数值试井、极值点分析及图版拟合等多方法相互验证的干扰试井解释方法。并以沁水盆地南部柿庄南区块A-B井组为例进行了分析,所得井间连通性及方位渗透率与该区域地质特征基本一致。测试结果对该区域压裂设计、开发方案的制定等具有重要作用。
[Abstract]:Interference well testing is an important means to determine inter-well relationship, connectivity and to solve the cross-well formation characteristics. The bottom hole pressure is the compound pressure after the recovery pressure of the well is superimposed by the disturbance of the excited well. Different from the original reservoir pressure with uniform background pressure of conventional interference well testing or the characteristic of linear variation, the square of net interference pressure separation from bottom hole pressure of coal bed methane has been put forward by using multi-well numerical well test analysis. Law; The interference well test interpretation method, which is verified by numerical well testing, extreme point analysis and pattern fitting, is adopted. The A-B well group in Shizhuangnan block in southern Qinshui Basin is taken as an example. The interwell connectivity and azimuth permeability are basically consistent with the geological characteristics of the region, and the test results play an important role in fracturing design and development scheme in the region.
【作者单位】：黑龙江省煤田地质测试研究中心;中联煤层气有限责任公司;
【基金】：国家科技重大专项资助项目(2011ZX05060)
【分类号】：TE373
【正文快照】： 干扰试井属于多井不稳定试井范畴,目的是确定井间关系、连通状况和求解井间地层特性[1]。测试工艺为在激动井和观察井同时下入高灵敏度的电子压力计后,改变激动井的工作制度,从观察井上接收由于激动井工作制度改变所造成的压力变化。通过观察井与激动井的同步监测,判断井间连

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